Statistics – Computation
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3121608w&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 21, CiteID L21608
Statistics
Computation
3
Exploration Geophysics: Computational Methods, Seismic, Exploration Geophysics: Data Processing, Exploration Geophysics: Seismic Methods (3025), Mathematical Geophysics: Inverse Theory, Physical Properties Of Rocks: Wave Attenuation
Scientific paper
Taking account the earth Q effect (i.e., frequency-dependent amplitude decay and velocity dispersion) during seismic migration simultaneously, the resultant seismic image is expected to be high resolution with true amplitude and correct timing. We present here a stabilized algorithm for such a ``migration incorporating inverse Q filtering'' scheme, so that the imaging technique is applicable to seismographs with long recording time. The earth model is assumed to be 1-D with continuous variations vertically in velocity and attenuation, and the imaging algorithm is implemented easily and efficiently in the frequency-wavenumber domain. Although such a 1-D model suits mostly to the cases in lithospheric-scale regional geophysics, it is sometimes also suitable to the exploration seismic studies. The method is demonstrated using a real data example from exploration seismics with an attempt to recover a target reflection underneath a group of strong coal-seam reflections.
Guo Jian
Wang Yanghua
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